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                                <h3 id="1&#x642D;&#x5EFA;eureka-server-&#x96C6;&#x7FA4;"><a name="1&#x642D;&#x5EFA;eureka-server-&#x96C6;&#x7FA4;" class="plugin-anchor" href="#1&#x642D;&#x5EFA;eureka-server-&#x96C6;&#x7FA4;"><i class="fa fa-link" aria-hidden="true"></i></a>1.&#x642D;&#x5EFA;Eureka Server &#x96C6;&#x7FA4;</h3>
<p>&#x590D;&#x5236;&#x4E00;&#x4EFD;&#x539F;&#x6709;&#x7684;Eureka Server&#x9879;&#x76EE;&#xFF0C;&#x8BB0;&#x5F97;&#x4FEE;&#x6539;&#x7AEF;&#x53E3;&#x53F7;&#xFF0C;&#x8FD8;&#x6709;yml&#x7684;&#x6CE8;&#x518C;&#x4E2D;&#x5FC3;&#x5730;&#x5740;&#xFF0C;&#x522B;&#x7684;&#x6CA1;&#x4EC0;&#x4E48;&#x53D8;&#x5316;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">server:</span>
<span class="hljs-attr">  port:</span> <span class="hljs-number">7002</span>

<span class="hljs-attr">eureka:</span>
<span class="hljs-attr">  instance:</span>
      <span class="hljs-comment"># eureka&#x670D;&#x52A1;&#x7AEF;&#x7684;&#x5B9E;&#x4F8B;&#x540D;&#x79F0;</span>
<span class="hljs-attr">    hostname:</span> localhost
<span class="hljs-attr">  client:</span>
      <span class="hljs-comment"># false&#x8868;&#x793A;&#x4E0D;&#x5411;&#x6CE8;&#x518C;&#x4E2D;&#x5FC3;&#x6CE8;&#x518C;&#x81EA;&#x5DF1;&#x3002;</span>
<span class="hljs-attr">    register-with-eureka:</span> <span class="hljs-literal">false</span>
    <span class="hljs-comment"># false&#x8868;&#x793A;&#x81EA;&#x5DF1;&#x7AEF;&#x5C31;&#x662F;&#x6CE8;&#x518C;&#x4E2D;&#x5FC3;&#xFF0C;&#x6211;&#x7684;&#x804C;&#x8D23;&#x5C31;&#x662F;&#x7EF4;&#x62A4;&#x670D;&#x52A1;&#x5B9E;&#x4F8B;&#xFF0C;&#x5E76;&#x4E0D;&#x9700;&#x8981;&#x53BB;&#x68C0;&#x7D22;&#x670D;&#x52A1;</span>
<span class="hljs-attr">    fetch-registry:</span> <span class="hljs-literal">false</span>
<span class="hljs-attr">    service-url:</span>
        <span class="hljs-comment"># &#x8BBE;&#x7F6E;&#x4E0E;Eureka Server&#x4EA4;&#x4E92;&#x7684;&#x5730;&#x5740;&#x67E5;&#x8BE2;&#x670D;&#x52A1;&#x548C;&#x6CE8;&#x518C;&#x670D;&#x52A1;&#x90FD;&#x9700;&#x8981;&#x4F9D;&#x8D56;&#x8FD9;&#x4E2A;&#x5730;&#x5740;</span>
<span class="hljs-attr">      defaultZone:</span> http://${eureka.instance.hostname}:${server.port}/eureka/
</code></pre>
<h3 id="2&#x642D;&#x5EFA;eureka-client-provider-&#x652F;&#x4ED8;&#x6A21;&#x5757;&#x96C6;&#x7FA4;"><a name="2&#x642D;&#x5EFA;eureka-client-provider-&#x652F;&#x4ED8;&#x6A21;&#x5757;&#x96C6;&#x7FA4;" class="plugin-anchor" href="#2&#x642D;&#x5EFA;eureka-client-provider-&#x652F;&#x4ED8;&#x6A21;&#x5757;&#x96C6;&#x7FA4;"><i class="fa fa-link" aria-hidden="true"></i></a>2.&#x642D;&#x5EFA;Eureka Client provider &#x652F;&#x4ED8;&#x6A21;&#x5757;&#x96C6;&#x7FA4;</h3>
<p>&#x590D;&#x5236;&#x4E00;&#x4EFD;&#x539F;&#x6709;&#x7684; <code>payment</code> &#x9879;&#x76EE;&#xFF0C;&#x8BB0;&#x5F97;&#x4FEE;&#x6539;&#x7AEF;&#x53E3;&#x53F7;&#xFF0C;&#x8FD8;&#x6709;yml&#x7684;&#x6CE8;&#x518C;&#x4E2D;&#x5FC3;&#x5730;&#x5740;&#xFF0C;&#x522B;&#x7684;&#x6CA1;&#x4EC0;&#x4E48;&#x53D8;&#x5316;</p>
<pre><code class="lang-yaml"><span class="hljs-attr">server:</span>
<span class="hljs-attr">  port:</span> <span class="hljs-number">8002</span>

<span class="hljs-attr">spring:</span>
<span class="hljs-attr">  application:</span>
<span class="hljs-attr">    name:</span> payment
<span class="hljs-attr">  datasource:</span>
<span class="hljs-attr">    type:</span> com.alibaba.druid.pool.DruidDataSource
<span class="hljs-attr">    driver-class-name:</span> org.gjt.mm.mysql.Driver
<span class="hljs-attr">    url:</span> jdbc:mysql://localhost:<span class="hljs-number">3306</span>/bigdata?useUnicode=<span class="hljs-literal">true</span>&amp;characterEncoding=utf<span class="hljs-bullet">-8</span>&amp;useSSL=<span class="hljs-literal">false</span>
<span class="hljs-attr">    username:</span> root
<span class="hljs-attr">    password:</span> ****

<span class="hljs-attr">mybatis:</span>
<span class="hljs-attr">  mapper-locations:</span> classpath:sqlMapper/*.xml
<span class="hljs-attr">  type-aliases-package:</span> com.***.springcloud.entities  <span class="hljs-comment"># &#x6240;&#x5728;entity&#x522B;&#x540D;&#x7C7B;&#x6240;&#x5728;&#x5305;</span>

<span class="hljs-attr">eureka:</span>
<span class="hljs-attr">  client:</span>
<span class="hljs-attr">    register-with-eureka:</span> <span class="hljs-literal">true</span>
<span class="hljs-attr">    fetch-registry:</span> <span class="hljs-literal">true</span>
<span class="hljs-attr">    service-url:</span>
<span class="hljs-attr">      defaultZone:</span> http://localhost:<span class="hljs-number">7001</span>/eureka/,http://localhost:<span class="hljs-number">7002</span>/eureka/  <span class="hljs-comment">#8001&#x90A3;&#x4E2A;&#x9879;&#x76EE;&#x4E5F;&#x8981;&#x6539;&#x6210;&#x4E24;&#x4E2A;</span>
</code></pre>
<h3 id="3&#x8C03;&#x7528;&#x4E4B;&#x540E;"><a name="3&#x8C03;&#x7528;&#x4E4B;&#x540E;" class="plugin-anchor" href="#3&#x8C03;&#x7528;&#x4E4B;&#x540E;"><i class="fa fa-link" aria-hidden="true"></i></a>3.&#x8C03;&#x7528;&#x4E4B;&#x540E;</h3>
<p>&#x7531;&#x4E8E;&#x8FD8;&#x672A;&#x6DFB;&#x52A0;&#x6A21;&#x5757;&#x4E4B;&#x95F4;&#x7684;&#x8C03;&#x7528;&#x65B9;&#x5F0F;&#xFF0C;&#x800C;&#x662F;&#x4F7F;&#x7528;&#x666E;&#x901A;&#x7684; <code>RestTemplate.getForObject(url,Response.class,param);</code></p>
<p>&#x901A;&#x8FC7;&#x8BA2;&#x5355;&#x6A21;&#x5757;&#x8C03;&#x7528;&#x652F;&#x4ED8;&#x6A21;&#x5757;&#x53D1;&#x73B0;&#x6BCF;&#x6B21;&#x8C03;&#x7528;&#x7684;&#x90FD;&#x662F;&#x56FA;&#x5B9A;&#x7684;&#x5176;&#x4E2D;&#x4E00;&#x4E2A;provider&#xFF0C;&#x56E0;&#x4E3A;url&#x5199;&#x6B7B;&#x4E86;&#x3002;</p>
<ul>
<li>&#x6B64;&#x65F6;&#x5C06;url&#x6539;&#x4E3A;&#x670D;&#x52A1;&#x540D;&#xFF0C;&#x4E5F;&#x5C31;&#x662F;&#xFF1A;<code>http://payment</code></li>
<li>&#x518D;&#x5C06;RestTemplate&#x914D;&#x7F6E;&#x7C7B;&#x4E0A;&#x6DFB;&#x52A0;<code>@LoadBalanced</code></li>
</ul>
<h3 id="4loanbalanced-&#x6982;&#x8FF0;"><a name="4loanbalanced-&#x6982;&#x8FF0;" class="plugin-anchor" href="#4loanbalanced-&#x6982;&#x8FF0;"><i class="fa fa-link" aria-hidden="true"></i></a>4.@LoanBalanced &#x6982;&#x8FF0;</h3>
<p>&#x8BE5;&#x6CE8;&#x89E3;&#x7528;&#x4E8E;&#x6807;&#x8BB0; &#x8981;&#x914D;&#x7F6E;&#x4E3A;&#x4F7F;&#x7528;LoadBalancerClient&#x7684;RestTemplate Bean&#x7684;</p>
<pre><code class="lang-java"><span class="hljs-meta">@Target</span>({ElementType.FIELD, ElementType.PARAMETER, ElementType.METHOD})
<span class="hljs-meta">@Retention</span>(RetentionPolicy.RUNTIME)
<span class="hljs-meta">@Documented</span>
<span class="hljs-meta">@Inherited</span>
<span class="hljs-meta">@Qualifier</span>
<span class="hljs-keyword">public</span> <span class="hljs-meta">@interface</span> LoadBalanced {
}
</code></pre>
<p>&#x90A3;&#x4EC0;&#x4E48;&#x662F;LoadBalancerClient&#xFF1F;</p>
<pre><code class="lang-java"><span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">interface</span> <span class="hljs-title">ServiceInstanceChooser</span> </span>{
    <span class="hljs-function">ServiceInstance <span class="hljs-title">choose</span><span class="hljs-params">(String serviceId)</span></span>;
}

<span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">interface</span> <span class="hljs-title">LoadBalancerClient</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">ServiceInstanceChooser</span> </span>{
    &lt;T&gt; <span class="hljs-function">T <span class="hljs-title">execute</span><span class="hljs-params">(String serviceId, LoadBalancerRequest&lt;T&gt; request)</span> <span class="hljs-keyword">throws</span> IOException</span>;

    &lt;T&gt; <span class="hljs-function">T <span class="hljs-title">execute</span><span class="hljs-params">(String serviceId, ServiceInstance serviceInstance, LoadBalancerRequest&lt;T&gt; request)</span> <span class="hljs-keyword">throws</span> IOException</span>;

    <span class="hljs-function">URI <span class="hljs-title">reconstructURI</span><span class="hljs-params">(ServiceInstance instance, URI original)</span></span>;
}
</code></pre>
<ul>
<li><p>ServiceInstance choose(String serviceId)&#xFF1A;&#x6839;&#x636E;&#x4F20;&#x8FDB;&#x6765;&#x7684;&#x670D;&#x52A1;&#x540D;&#x4ECE;&#x5BA2;&#x6237;&#x7AEF;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#x4E2D;&#x6311;&#x9009;&#x4E00;&#x4E2A;&#x5B9E;&#x4F8B;</p>
</li>
<li><p>T execute&#xFF1A;&#x4F7F;&#x7528;&#x8D1F;&#x8F7D;&#x5747;&#x8861;&#x5668;&#x4E2D;&#x6311;&#x9009;&#x51FA;&#x6765;&#x7684;&#x670D;&#x52A1;&#x5B9E;&#x4F8B;&#x6765;&#x6267;&#x884C;&#x8BF7;&#x6C42;&#x3002;</p>
</li>
<li><p>URI reconstructURI&#xFF1A;&#x8868;&#x793A;&#x4E3A;&#x7CFB;&#x7EDF;&#x6784;&#x5EFA;&#x4E00;&#x4E2A;&#x5408;&#x9002;&#x7684;URI&#xFF0C;&#x6211;&#x4EEC;&#x53D1;&#x9001;&#x8BF7;&#x6C42;&#x65F6;&#x4F7F;&#x7528;&#x7684;&#x662F;&#x670D;&#x52A1;&#x540D;&#xFF08;<code>http://payment</code>&#xFF09;&#x800C;&#x4E0D;&#x662F;&#x5177;&#x4F53;&#x7684;&#x5730;&#x5740;&#xFF0C;&#x5728;&#x8BE5;&#x65B9;&#x6CD5;&#x4E2D;&#xFF0C;&#x7B2C;&#x4E00;&#x4E2A;&#x53C2;&#x6570;<code>ServiceInstance</code>&#x662F;&#x4E00;&#x4E2A;&#x5E26;&#x6709;Host&#x548C;Port&#x7684;&#x5177;&#x4F53;&#x670D;&#x52A1;&#x5B9E;&#x4F8B;&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x662F;&#x4F7F;&#x7528;&#x903B;&#x8F91;&#x670D;&#x52A1;&#x540D;&#x5B9A;&#x4E49;&#x4E3A;Host&#x548C;Port&#x7684;URL&#xFF0C;&#x800C;&#x8FD4;&#x56DE;&#x7684;URI&#x5219;&#x662F;&#x901A;&#x8FC7;&#x670D;&#x52A1;&#x5B9E;&#x4F8B;&#x62FC;&#x63A5;&#x51FA;&#x6765;&#x7684;&#x3002;&#x7B80;&#x5355;&#x6765;&#x8BF4;&#x5C31;&#x662F;&#x628A;<code>http://payment</code> -&gt;<code>http://ip:port</code></p>
</li>
</ul>
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